/**
 * @param {number} n
 * @return {number}
 */
var trailingZeroes = function(n) {
  if(n == 0) return 0;
  for(let i = n; i >= 0; i--) {

  }
};
let n = 3;
console.log(trailingZeroes(3));
n = 5;
console.log(trailingZeroes(3));
n = 0;
console.log(trailingZeroes(3));
